![]() The components of the control system are rod drives and position indicators, two wide-range log/linear power channels, fuel temperature instrumentations, a shutdown drawer, an operational interlock drawer, and the ACRR timer. The control system consists of all components used to control power and reactivity. The PPS is not used for control purposes, but is solely intended to provide protective action. ![]() Manual scram and the low detector bias voltage scram are provided in all modes of operation. C and 115% of nominal maximum steady-state power of 2.0 MW. The LSSS values for these safety channels are, respectively, 1400 deg. In the steady-state modes of operation, the PPS has scram capability on fuel temperature and percent power. ACRR Technical Specification LSSS values for these parameters are 1400 deg. In the pulse modes of operation, each PPS instrumentation drawer has scram capability on fuel temperature, peak power (nv), and energy (nvt). The PPS satisfies the intent of the more ยป IEEE-279 standard, in as much as it contains diverse, redundant, and physically and electrically-isolated protective action channels. The safety related instrumentation for the ACRR is contained in the Plant Protect System (PPS), which includes two instrumentation drawers and the magnet power supply. ![]() During the first two years of operation, the ACRR Control System has performed in an excellent manner satisfying all of its original objectives. The ACRR Control System replaced the ACPR control console and includes many features which improve safety, control, and flexibility in the operation of the reactor. The Annular Core Research Reactor (ACRR) Control System was designed by Sandia National Laboratories and built by General Atomic Company.
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